Molding composition containing organomagnesium compounds



15 of phenol .and

. 4t rated and the mass thoroughly mixed ,for a Patented Apr. '13,}1926.

CAB IIETON I ELLIS,

ilometers, rmw .nuasr'nr; mmm r0 mam 002i 17m. A. CORPORATION 01 NEWHI'EBBIY.

momma oourosrrron commute oneanonemnn r;

llfo Drawing. Application filed June as,

To all whom it may camera: I

Be it known that I, C'AnLn'roN ELLIS, a citizen of the United States, and a resident of Montclair, in the county of Essex and State of New J ersey, .have invented certain new and useful Im rovements in Molding Compositions Oontaming Organomagnesium Compounds, of which the following is a specification.

This invention relates to resinous products and particularly to molding. compositions made therefrom. v

The invention will be illustrated "by the following procedure: 100 parts .by-weight 28 parts of magnesium hydrate or approximately one equivalent of phenolto. anequi'valent of magnesium hydrate are mixed and 110 parts of aqueous formaldehyde of approximately 37 to 40 20 per cent strength are boiled together for a period of 90' minutes, preferably under a reflux condenser. It is not necessary. to use a closed vessel or. digestor as there is practically no loss of formaldehyde onheating '25 and refluxing at atmospheric pressure. A

solution is obtained which is thm when hot and of molasses-like to jelly-like consistency when cold. When prepared from "phenol of good quality it is yellow in color. The so solution will. contain about 56 per dent of determined by drying in solid material-as -vacuo.

The course of the reaction involved in-the above procedure is'marked by a. curiousina5 crease in alkalinity and then' airecession in the alkaline content as determined b titra-;

- 'tionof filtered solutions. As ;a V o with phenol recession of alkalinity occurs after a 'maximum reached on boiling- .fior about. one 4 -hour. T p The ho solution, may then be mixed with a filler for example wood 'flour. 'Thusa uantity of woodflour equaL in weight to .t e total solids .ofthesolutionj is incorpoa half hour. to, an hour. B boiling solution to. the woo flour an excel-- lent effect is secured in-that impre ation of -the fibres oocursand molded articles of a desirable degree of translucency are obtamed. v.

pp i the binders. p

was; Serial- 1x04473150.

and the vacuum heated with wetsteam I approximately one hour is required for drying at a vacuum of 28 inches. Adesirab'le' control over the degree of drying is shown" by having a thermometer bul in the la er of mater1al;' when the temperature reac es about 90 the drying has progressed a suflicient degree as a. ruler When removed from the dryer the ma-; terial is liableto-be'lum-py andmay be ground in a comm-inutoror ,pebblemill or any other suitable grinding device. Made according to the fore oing procedure some ditiiculty may arise ro'm adhesion to the mold in hot pressing. .This may be overcome by the addition of 1 per cent of alumi-- L grinding ,in a ball mill for one hour. The aluminum palmita-te should pass 100 mesh screen. By fiour'in the The composition cures readil in a hot press at a temperature of 160-1 0 C. givm .a light brown molded article which in num palmitate to the composition and 1a 7 articles of 3 aluminum" palmitate stiokmgdi v culties are overcome.

thm sections is translucent. The fins caused flexible and translucent. They may broken "away from the edges of'the molded articlevery readily to yield a clean lookin specimen. Atthe temperature 'mentione from 2 to curing period. y

Besidesbeing noteworthy for'fiowabilit'y;

'by extrusion from the molds are unusually 6 minutesusually'suflices forythe flexibility and translucency the product has the actionof boiling solutions of aqueous caustic alkalis which afl'ect many other molded articles made with binders of a dit "ferent character, including various synthetic the advantage of being relatively resistant to 4 I "In the case of cresol such as ordinary com- -mer(iial mixtures of meta and paracresol the reaction appears to be somewhat more rapid than with the phenol. Thus boiling a mixturewof parts of thecresol,27 parts of magnesium hydrate (vacuum dried hydrate) and 100-parts of Ordinary aqueous formaldehyde solution of 37-40 per cent strength, the reaction advances so rapidly that in about 45 minutes time the solution may be mixed cost of equipment required. The latter in sure instead of using a vacuum (pan.

any case may be of a very simple and inexpensive character, this is especially the case when drying is carried out t ordinary pres- In place of aqueous formal ehyde it is Igossible touse paraform and water or other erivative of formaldehyde capable of reacting in'like manner. Also the addition of other aldehydes of an appropriate character is not precluded. Instead of phenol or cresol, mixtures of phenolic bodies may be employed. v

: Various mineral fillers such as china clay, talc, asbestos and the like may be employed with or without sawdust or wood flour. The use of any specific filler does not form a part of the present invention as any of the fillers .ordinarily' used in the plastic molding industry are in most cases appropriate for the purpose. When using a filler of the cellu-' 'lose type the organo magnesium comfipound ect in present appears to have adesirable e the presence of water of impregnating and swelling the fibres to a degree which lends toxthe production of translucent articles.

' The proportionof filler'may be varied wide- I ly and in-the case of filler of the wood flour type, although I have indicated equal roportions of filler and binder in the first i ustration Ido'n'ot wish to belimited to such proportions but'may use two or three times as much filler as binder in somecases. The

' use of anta'queous solution containing the organomagnesium compound apparently enables better penetration or impregnation binder. c apness of such filling material, the larger a ount of filler used,

g cheapening inthewhich coupled with the flowabilityof the compound results in the possibility of using --a major proportion of filler-and particularly.

one to three parts of filler to one part of the Owing to the results in a correspondi cost of manufacture.

As indicated the entire procedure has been developed with the.

v urpose of obtaining" a process which woul enablemolding comgether a phenolic body nesium compound containing magnesium'.

position to be produced from the raw materials within the time of an ordinary working" dayr The present invention accomplishes this aim:

The period of boiling the reacting constituents should not be too protracted as molding compositions made from such products do not moldto form as good a surface. However the boiling may be carried out for a period of 2 hours or thereabouts without indication of any separation into two layers. The proportion of formaldehyde may be varied somewhat. A weight of aqueous 40 per cent formaldehyde approximately equal to the weight of phenol used is satisfactory but larger .or smaller proportions of formaldehyde also may be used in some cases.

What I claim is 1. The process which comprises heating together approximately equal molecular proportions of a phenolic body and a basic magnesium compound. comprising magnesium hydroxide in the presence of at least a molecular proportion of formaldehyde in aqueous solution, .whereby a solution. of reaction products is obtained whichis thin and penetrafiing when hot and highly viscous when co 3. A molding composition comprising the products of reaction of phenol, magnesium hydroxide and aqueous formaldehyde, all in approximately molecular combining proportions.

4. A molding composition comprisi productsof reaction of a phenolic bo y, a basic magnesium com ound comprising magnesium hydroxide an formaldehyde.

5. A'prooess' which consists in heating tothe hydroxide in the presence of aqueous formal-- dehyde to produce a resin containing substance, and in absorbing such resin containing substance in a finely divided filler. V

6. A process which comprises heating to;

and a basic maghydroxide in the presence of aqueous formal-,- dehyde to produce a resin containing substance, and in absorbing such resincontainin .substance'in a finely divided filler of the ce lulose type. I

7. A process which comprises heating. to-

gether 'a phenolic body and a basic mag.

f dehyde to produce a resin contammg sub- 1 1,580,425 I i i 8 nes ium compound comprising magnesium 1 8. A molding composition compris' the hydroxide in the presence of aqueous formal- Eroducts of reaction of a phenolic y, a asic magnesium compound containing mag- 10 stance, absorbing suchcontainingsubnesium hydroxide and formaldehyde, ab-

I l stance in .e'finely divided filler, drymgvthe sorbed in a. finely divided filler.

1y Witlfa mold lubricant.

absorption product, and mixing it intimater CABLE-TON ELLIS. 

